Premium MaterialThe exterior of the insulated bag is made of Oxford cloth, waterproof, stain-resistant and high density, durable, waterproof and easy to clean. High-quality waterproof fabric, durable and practical for outdoor use. The inner lining is made of PEVA sheet and padded, PEVA inner film to keep both warm and cold. Multifunctional Pockets: The bag has a large opening for easy loading and unloading. There are 2 side mesh pockets for drinks, bottles and umbrellas. There is also a mesh pocket on the lid of the bag that can be used for napkins and a deep front pocket, and the open front pocket can hold candy, keys, electronics and other small items. Large Capacity: 23L thermal insulated cooler backpack with large capacity and strong carrying capacity, suitable for both carrying a daily lunch and a picnic. Whether it's outdoor picnics, storing lunches and snacks, or packing cold drinks for outdoor events, this portable insulated bag is useful for a variety of applications. Leak-proof Protection: Upgraded with traditional sewing structure with hot-pressing technology to connect the cover perfectly and ensure excellent water resistance. Prevents liquid drainage caused by potholes on the road and pollutes your car. Humanized Design: The honeycomb-shaped breathable mesh back panel promotes air circulation while allowing maximum comfort. And the adjustable chest strap is good for adjusting the length to ease the burden on your shoulders and not slip off, superior comfort and ergonomics.